Glenn Morrison
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View article: Sorption of semi-volatile organic compounds to clothing textiles
Sorption of semi-volatile organic compounds to clothing textiles Open
Clothing can act as a barrier and a source of skin exposure to chemicals due to reversible accumulation on and within textile fibers. The partition coefficient quantifies the equilibrium relationship between textile and air for a specific …
View article: Analysis of overdispersion in airborne transmission of COVID-19
Analysis of overdispersion in airborne transmission of COVID-19 Open
Superspreading events and overdispersion are hallmarks of the COVID-19 pandemic. However, the specific roles and influence of established viral and physical factors related to the mechanisms of transmission, on overdispersion, remain unres…
View article: Composition of indoor organic surface films in residences: simulating the influence of sources, partitioning, particle deposition, and air exchange
Composition of indoor organic surface films in residences: simulating the influence of sources, partitioning, particle deposition, and air exchange Open
Indoor surfaces are coated with organic films that modulate thermodynamic interactions between the surfaces and room air. Recently published models can simulate film formation and growth via gas-surface partitioning, but none have statisti…
View article: Synergistic Effects of Ozone Reaction Products and Fine Particulate Matter on Respiratory Pathophysiology in Children with Asthma
Synergistic Effects of Ozone Reaction Products and Fine Particulate Matter on Respiratory Pathophysiology in Children with Asthma Open
After being transported from outdoor to indoor environments, a large portion of ozone (O3) reacts with indoor chemicals to generate O3 reaction products. A fraction of these products can partition to fine particulate matter (PM2.5). Hence,…
View article: Partitioning of Neutral PFAS in Homes and Release to the Outdoor Environment: Results from the IPA Campaign
Partitioning of Neutral PFAS in Homes and Release to the Outdoor Environment: Results from the IPA Campaign Open
The distribution and fate of per- and polyfluoroalkyl substances (PFAS) in homes are not well understood. To address this, we measured nine neutral PFAS in dust, airborne particles, dryer lint, and on heating and air conditioning (HAC) fil…
View article: Fluorotelomer alcohol (FTOH) emission rates from new and old rain jackets to air determined by iodide high-resolution chemical ionization mass spectrometry
Fluorotelomer alcohol (FTOH) emission rates from new and old rain jackets to air determined by iodide high-resolution chemical ionization mass spectrometry Open
Per- and polyfluoroalkyl substances (PFAS), which include fluorotelomer alcohols (FTOHs), are synthetic chemicals used in consumer products because of their water-, stain-, and grease-repellent properties; thus, PFAS are commonly found in …
View article: The chemical assessment of surfaces and air (CASA) study: using chemical and physical perturbations in a test house to investigate indoor processes
The chemical assessment of surfaces and air (CASA) study: using chemical and physical perturbations in a test house to investigate indoor processes Open
The Chemical Assessment of Surfaces and Air (CASA) study investigated how chemicals transform in the indoor environment using perturbations ( e.g. , cooking, cleaning) and additions of indoor and outdoor pollutants in a test house.
View article: Synergistic Effects of Ozone Reaction Products and Fine Particulate Matter on Respiratory Pathophysiology in Children with Asthma
Synergistic Effects of Ozone Reaction Products and Fine Particulate Matter on Respiratory Pathophysiology in Children with Asthma Open
After being transported from outdoor to indoor environments, a large portion of ozone (O3) reacts with indoor chemicals to generate O3 reaction products. A fraction of these products can partition to fine particulate matter (PM2.5). Hence,…
View article: Squalene Depletion in Skin Following Human Exposure to Ozone under Controlled Chamber Conditions
Squalene Depletion in Skin Following Human Exposure to Ozone under Controlled Chamber Conditions Open
A major component of human skin oil is squalene, a highly unsaturated hydrocarbon that protects the skin from atmospheric oxidants. Skin oil, and thus squalene, is continuously replenished on the skin surface. Squalene is also quickly cons…
View article: Reactive oxygen species on indoor surfaces
Reactive oxygen species on indoor surfaces Open
Reactive oxygen species (ROS) are present on indoor surfaces and form dynamically on surfaces coated with lipid mixtures that simulate indoor surface coatings.
View article: The persistence of smoke VOCs indoors: Partitioning, surface cleaning, and air cleaning in a smoke-contaminated house
The persistence of smoke VOCs indoors: Partitioning, surface cleaning, and air cleaning in a smoke-contaminated house Open
Wildfires are increasing in frequency, raising concerns that smoke can permeate indoor environments and expose people to chemical air contaminants. To study smoke transformations in indoor environments and evaluate mitigation strategies, w…
View article: Cloth–Air Partitioning of Neutral Per- and Polyfluoroalkyl Substances (PFAS) in North Carolina Homes during the Indoor PFAS Assessment (IPA) Campaign
Cloth–Air Partitioning of Neutral Per- and Polyfluoroalkyl Substances (PFAS) in North Carolina Homes during the Indoor PFAS Assessment (IPA) Campaign Open
Partitioning of per- and polyfluoroalkyl substances (PFAS) to indoor materials, including clothing, may prolong the residence time of PFAS indoors and contribute to exposure. During the Indoor PFAS Assessment (IPA) Campaign, we measured co…
View article: Assessment of aldehyde contributions to PTR-MS <i>m</i>/<i>z</i> 69.07 in indoor air measurements
Assessment of aldehyde contributions to PTR-MS <i>m</i>/<i>z</i> 69.07 in indoor air measurements Open
PTR m / z 69.07 commonly attributed to isoprene suffers interference from C 5 –C 10 aldehydes indoors, especially when ozone is present. The contribution of nonanal could be quantified by using the protonated molecular ion, unlike the othe…
View article: Quantifying the impact of relative humidity on human exposure to gas phase squalene ozonolysis products
Quantifying the impact of relative humidity on human exposure to gas phase squalene ozonolysis products Open
Models were developed to treat Criegee chemistry and estimate gas-phase squalene ozonolysis products under different conditions. Relative humidity can significantly impact human exposure to these products.
View article: The influence of personal care products on ozone-skin surface chemistry
The influence of personal care products on ozone-skin surface chemistry Open
Personal care products are increasingly being marketed to protect skin from the potentially harmful effects of air pollution. Here, we experimentally measure ozone deposition rates to skin and the generation rates and yields of oxidized pr…
View article: Why Indoor Chemistry Matters: A National Academies Consensus Study
Why Indoor Chemistry Matters: A National Academies Consensus Study Open
BACKGROUND AND AIM The indoor environment is a significant contributor to human chemical exposures and health risks, and indoor chemistry plays an important role in driving and modifying exposure to many indoor pollutants. Despite recent d…
View article: Why Indoor Chemistry Matters: A National Academies Consensus Report
Why Indoor Chemistry Matters: A National Academies Consensus Report Open
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTWhy Indoor Chemistry Matters: A National Academies Consensus ReportRima HabreRima HabreUniversity of Southern California, Los Angeles, California 90089, United StatesMore by Rima Habre, David C…
View article: Analysis of overdispersion in airborne transmission of COVID-19
Analysis of overdispersion in airborne transmission of COVID-19 Open
Superspreading events and overdispersion are hallmarks of the COVID-19 pandemic. However, the specific roles and influence of established viral and physical factors related to the mechanisms of transmission, on overdispersion, remain unres…
View article: How should we define an indoor surface?
How should we define an indoor surface? Open
An “indoor surface” is a commonly employed term in our community but one for which there is wide latitude given to its use. Consider the following expressions that all refer to an aspect of indoor surfaces: surface chemistry, s…
View article: Analysis of overdispersion in airborne transmission of Covid-19
Analysis of overdispersion in airborne transmission of Covid-19 Open
Superspreading events and overdispersion are hallmarks of the Covid-19 pandemic. To gain insight into the nature and controlling factors of these superspreading events and heterogeneity in transmission, we conducted mechanistic modeling of…
View article: Effect of Ozone, Clothing, Temperature, and Humidity on the Total OH Reactivity Emitted from Humans
Effect of Ozone, Clothing, Temperature, and Humidity on the Total OH Reactivity Emitted from Humans Open
People influence indoor air chemistry through their chemical emissions via breath and skin. Previous studies showed that direct measurement of total OH reactivity of human emissions matched that calculated from parallel measurements of vol…
View article: Evaluating Indoor Air Chemical Diversity, Indoor-to-Outdoor Emissions, and Surface Reservoirs Using High-Resolution Mass Spectrometry
Evaluating Indoor Air Chemical Diversity, Indoor-to-Outdoor Emissions, and Surface Reservoirs Using High-Resolution Mass Spectrometry Open
Detailed offline speciation of gas- and particle-phase organic compounds was conducted using gas/liquid chromatography with traditional and high-resolution mass spectrometers in a hybrid targeted/nontargeted analysis. Observations were foc…
View article: Continuous measurement of reactive oxygen species inside and outside of a residential house during summer
Continuous measurement of reactive oxygen species inside and outside of a residential house during summer Open
Reactive oxygen species (ROS) are an important contributor to adverse health effects associated with ambient air pollution. Despite infiltration of ROS from outdoors, and possible indoor sources (eg, combustion), there are limited data ava…
View article: Assessing Human Exposure to SVOCs in Materials, Products, and Articles: A Modular Mechanistic Framework
Assessing Human Exposure to SVOCs in Materials, Products, and Articles: A Modular Mechanistic Framework Open
A critical review of the current state of knowledge of chemical emissions from indoor sources, partitioning among indoor compartments, and the ensuing indoor exposure leads to a proposal for a modular mechanistic framework for predicting h…
View article: Issue Information
Issue Information Open
Aim and Scope of